Thermal and electrical insulator and process of manufacture thereof



gnueni'oz a q u A. A. SAMUEL July 15, 1930.

THERMAL AND ELECTRICAL INSULATOR AND PROCESS OF MANUFACTURE THEREOFFiled Feb. 1, 1927 Patented July 15, 1930 UNITED STATES ANDRE ALBERTSAMUEL, OF PARIS, FRANCE THERMAL AND ELECTRICAL INSULATOR AND PROCESS OFMANUFACTURE THEREOF Application filed February 1, 1927, Serial No.165,218, and in France February 6, 1926.

This invention 'has for its object a new product possessing a greatelectric and thermal insulating power, which is easy to work,non-inflammable, not brittle, not hygrometric and has a very highresistivity to the various chemical reagents.

Referring'to the drawings Figure 1 is a perspective view of a block offibrous material impregnated with Thiolite,

Fig. 2 is a section of a tube of said material having an embeddedfabric.

This product comprises substantially a fibrous core coated with thematerial known as Thiolite which has been described in wthe UnitedStates Patent 1,704,629, dated March 5, 1929, comprising the reactionproduct of sulphur chloride, a condensation prodnot 0.. a phenol and areactive methylene com pound.

The fibrous material used to form the core of the new product may behygrometric and consequently not liable to be generally used by itselffor constituting high insulations. In the present case after having beenpreviously dried and when embedded in Thiolite it will no longer be ableto absorb any Water or moisture.

Moreover a better result will be obtained particularly as regards itsmechanical properties when the fibrous matter constituting the core hasbeen previously woven in the shape of a band or fabric and feltered orgiven a certain mechanical strength by any appropriate means.

The core may be made for instance of as bestos or any cellulosicmaterial such as linen, paper, cardboard, etc.

The process of manufacture of this insulating compound is as follows:

The impregnation may be obtained in various manners.

The fibrous surface may be impregnated by immersion or coated on oneside with a Thiolite varnish, the solvents of which are subsequentlyevaporated.

These solvents are any volatile solvents for varnish, such as, forexample, acetone, carbon tetrachloride and volatile alcohols.

Several sheets manufactured as above indicated may be pressed togetherin a press, by

rolling in a calender or by stamping upon appropriate blocks and heatedsimultaneously or successively, in order to cause the elements to adheretogether in such a manner as to benefit by the softening of the Thiolitewhen heated and to polymerize the latter so as to cause the hardening ofthe whole and to ensure its acquiring all the desired proper ties.

The insulating compound produced according to the present invention maybe utilized in the manufacture of cylinders, boards, block: sticks andarticles of various shapes which may be subsequently worked or finishedmechanically.

It will be apparent that the various processes of manufacture of theproduct which have just been described are given merely by way ofexample and that I do not limit myself to the particulars hereindisclosed 7a inasmuch as any appropriate means may be employed to coveror embed the fibrous core in its Thiolite coating.

The Thiolite above mentioned is fully described in the aforesaid patent,to which reference may be made.-

Having thus described and ascertained the nature of my said invention, Ideclare that what I claim and desire to secure by Letters Patent of theUnited States is 1. A thermal and electrical insulator comprising a coreof dried fibrous material embedded in a reaction product of sulphurchloride and a condensation product of .a phenol with a reactivemethylene compound.

2-. A thermal and electrical insulator, comprising a core of wovenfibrous material dried and embedded in a reaction product of sul phurchloride and a condensation product of a phenol with a reactivemethylene compound.

3. A thermal and electrical insulator, comprising a dried cellulosicmaterial embedded in a reaction product of sulphur chloride and a phenolcondensation product of a reactive methylene compound.

4. A thermal and electrical insulator comprising a fibrous materialembedded in a hardened reaction product of a su phur chloride and aphenol condensation product with a reactive methylene compound.

5. A process comprising impregnating a fibrous material with a solutionof a reaction product of sulphur chloride and a phenol condensationproduct of a reactive methylene compound, evaporating the solvent andhardening the product by heat.

In testimony that I claim the foregoing as my invention, I have signedmy name.

ANDRE ALBERT SAMUEL;

